Malicious PDF — malware analysis report

Static analysis result for SHA-256 21d5b46827eff8eb…

MALICIOUS

PDF

58.8 KB Created: 2020-08-24 02:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d764c2606fbc1e16bc825c6f6c3fa835 SHA-1: 7ebaf681467a2776d5c9d5c9f62ef878205a5b4c SHA-256: 21d5b46827eff8eb4004a75e12b0c5b979294e6c2e0aef1685aad4a9da2fbe69
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The ML classifier also flagged this PDF with high confidence. The overall attack pattern is a phishing lure disguised as helpful content to redirect the user to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=logo+quiz+ultimate+answers+level+41 In PDF document text
    • http://files.davidleakeesq.com/uploads/1/3/0/8/130814874/vibew.pdfIn PDF document text
    • http://metigikiw.adventuresatyourdoorstep.com/uploads/1/3/0/7/130740572/9585232.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6153/3089/files/xibafabopejegakewiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5050/6142/files/padukazanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5464/4894/files/furadogafepuzi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5082/6905/files/delex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2911/8627/files/yonder_come_day_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2264/6422/files/atomic_habits_cheat_sheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8648/6440/files/zadaxezawumasuzolunixodeg.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009b19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B19 5416 bytes
SHA-256: 1fd9de1e6b660ac014b8f6558ee2fac76a009b23429f02225d854d74e56ee747
font_01_sfnt_off0000ad95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD95 15856 bytes
SHA-256: 26091c9a0b9e147b7d414e0aceec63b92f3a8e75e6aa81ffaafaea706af5b4c0

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